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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.net.telnet;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    /**<a name="line.20"></a>
<FONT color="green">021</FONT>     * The TelnetCommand class cannot be instantiated and only serves as a<a name="line.21"></a>
<FONT color="green">022</FONT>     * storehouse for telnet command constants.<a name="line.22"></a>
<FONT color="green">023</FONT>     * @see org.apache.commons.net.telnet.Telnet<a name="line.23"></a>
<FONT color="green">024</FONT>     * @see org.apache.commons.net.telnet.TelnetClient<a name="line.24"></a>
<FONT color="green">025</FONT>     */<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>    public final class TelnetCommand<a name="line.27"></a>
<FONT color="green">028</FONT>    {<a name="line.28"></a>
<FONT color="green">029</FONT>        /*** The maximum value a command code can have.  This value is 255. ***/<a name="line.29"></a>
<FONT color="green">030</FONT>        public static final int MAX_COMMAND_VALUE = 255;<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>        /*** Interpret As Command code.  Value is 255 according to RFC 854. ***/<a name="line.32"></a>
<FONT color="green">033</FONT>        public static final int IAC = 255;<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        /*** Don't use option code.  Value is 254 according to RFC 854. ***/<a name="line.35"></a>
<FONT color="green">036</FONT>        public static final int DONT = 254;<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>        /*** Request to use option code.  Value is 253 according to RFC 854. ***/<a name="line.38"></a>
<FONT color="green">039</FONT>        public static final int DO = 253;<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>        /*** Refuse to use option code.  Value is 252 according to RFC 854. ***/<a name="line.41"></a>
<FONT color="green">042</FONT>        public static final int WONT = 252;<a name="line.42"></a>
<FONT color="green">043</FONT>    <a name="line.43"></a>
<FONT color="green">044</FONT>        /*** Agree to use option code.  Value is 251 according to RFC 854. ***/<a name="line.44"></a>
<FONT color="green">045</FONT>        public static final int WILL = 251;<a name="line.45"></a>
<FONT color="green">046</FONT>    <a name="line.46"></a>
<FONT color="green">047</FONT>        /*** Start subnegotiation code.  Value is 250 according to RFC 854. ***/<a name="line.47"></a>
<FONT color="green">048</FONT>        public static final int SB = 250;<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>        /*** Go Ahead code.  Value is 249 according to RFC 854. ***/<a name="line.50"></a>
<FONT color="green">051</FONT>        public static final int GA = 249;<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>        /*** Erase Line code.  Value is 248 according to RFC 854. ***/<a name="line.53"></a>
<FONT color="green">054</FONT>        public static final int EL = 248;<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        /*** Erase Character code.  Value is 247 according to RFC 854. ***/<a name="line.56"></a>
<FONT color="green">057</FONT>        public static final int EC = 247;<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>        /*** Are You There code.  Value is 246 according to RFC 854. ***/<a name="line.59"></a>
<FONT color="green">060</FONT>        public static final int AYT = 246;<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>        /*** Abort Output code.  Value is 245 according to RFC 854. ***/<a name="line.62"></a>
<FONT color="green">063</FONT>        public static final int AO = 245;<a name="line.63"></a>
<FONT color="green">064</FONT>    <a name="line.64"></a>
<FONT color="green">065</FONT>        /*** Interrupt Process code.  Value is 244 according to RFC 854. ***/<a name="line.65"></a>
<FONT color="green">066</FONT>        public static final int IP = 244;<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /*** Break code.  Value is 243 according to RFC 854. ***/<a name="line.68"></a>
<FONT color="green">069</FONT>        public static final int BREAK = 243;<a name="line.69"></a>
<FONT color="green">070</FONT>    <a name="line.70"></a>
<FONT color="green">071</FONT>        /*** Data mark code.  Value is 242 according to RFC 854. ***/<a name="line.71"></a>
<FONT color="green">072</FONT>        public static final int DM = 242;<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>        /*** No Operation code.  Value is 241 according to RFC 854. ***/<a name="line.74"></a>
<FONT color="green">075</FONT>        public static final int NOP = 241;<a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>        /*** End subnegotiation code.  Value is 240 according to RFC 854. ***/<a name="line.77"></a>
<FONT color="green">078</FONT>        public static final int SE = 240;<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>        /*** End of record code.  Value is 239. ***/<a name="line.80"></a>
<FONT color="green">081</FONT>        public static final int EOR = 239;<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>        /*** Abort code.  Value is 238. ***/<a name="line.83"></a>
<FONT color="green">084</FONT>        public static final int ABORT = 238;<a name="line.84"></a>
<FONT color="green">085</FONT>    <a name="line.85"></a>
<FONT color="green">086</FONT>        /*** Suspend process code.  Value is 237. ***/<a name="line.86"></a>
<FONT color="green">087</FONT>        public static final int SUSP = 237;<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>
<FONT color="green">089</FONT>        /*** End of file code.  Value is 236. ***/<a name="line.89"></a>
<FONT color="green">090</FONT>        public static final int EOF = 236;<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>        /*** Synchronize code.  Value is 242. ***/<a name="line.92"></a>
<FONT color="green">093</FONT>        public static final int SYNCH = 242;<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>        /*** String representations of commands. ***/<a name="line.95"></a>
<FONT color="green">096</FONT>        private static final String __commandString[] = {<a name="line.96"></a>
<FONT color="green">097</FONT>                    "IAC", "DONT", "DO", "WONT", "WILL", "SB", "GA", "EL", "EC", "AYT",<a name="line.97"></a>
<FONT color="green">098</FONT>                    "AO", "IP", "BRK", "DMARK", "NOP", "SE", "EOR", "ABORT", "SUSP", "EOF"<a name="line.98"></a>
<FONT color="green">099</FONT>                };<a name="line.99"></a>
<FONT color="green">100</FONT>    <a name="line.100"></a>
<FONT color="green">101</FONT>        private static final int __FIRST_COMMAND = IAC;<a name="line.101"></a>
<FONT color="green">102</FONT>        private static final int __LAST_COMMAND = EOF;<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>        /***<a name="line.104"></a>
<FONT color="green">105</FONT>         * Returns the string representation of the telnet protocol command<a name="line.105"></a>
<FONT color="green">106</FONT>         * corresponding to the given command code.<a name="line.106"></a>
<FONT color="green">107</FONT>         * &lt;p&gt;<a name="line.107"></a>
<FONT color="green">108</FONT>         * @param code The command code of the telnet protocol command.<a name="line.108"></a>
<FONT color="green">109</FONT>         * @return The string representation of the telnet protocol command.<a name="line.109"></a>
<FONT color="green">110</FONT>         ***/<a name="line.110"></a>
<FONT color="green">111</FONT>        public static final String getCommand(int code)<a name="line.111"></a>
<FONT color="green">112</FONT>        {<a name="line.112"></a>
<FONT color="green">113</FONT>            return __commandString[__FIRST_COMMAND - code];<a name="line.113"></a>
<FONT color="green">114</FONT>        }<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>        /***<a name="line.116"></a>
<FONT color="green">117</FONT>         * Determines if a given command code is valid.  Returns true if valid,<a name="line.117"></a>
<FONT color="green">118</FONT>         * false if not.<a name="line.118"></a>
<FONT color="green">119</FONT>         * &lt;p&gt;<a name="line.119"></a>
<FONT color="green">120</FONT>         * @param code  The command code to test.<a name="line.120"></a>
<FONT color="green">121</FONT>         * @return True if the command code is valid, false if not.<a name="line.121"></a>
<FONT color="green">122</FONT>         **/<a name="line.122"></a>
<FONT color="green">123</FONT>        public static final boolean isValidCommand(int code)<a name="line.123"></a>
<FONT color="green">124</FONT>        {<a name="line.124"></a>
<FONT color="green">125</FONT>            return (code &lt;= __FIRST_COMMAND &amp;&amp; code &gt;= __LAST_COMMAND);<a name="line.125"></a>
<FONT color="green">126</FONT>        }<a name="line.126"></a>
<FONT color="green">127</FONT>    <a name="line.127"></a>
<FONT color="green">128</FONT>        // Cannot be instantiated<a name="line.128"></a>
<FONT color="green">129</FONT>        private TelnetCommand()<a name="line.129"></a>
<FONT color="green">130</FONT>        { }<a name="line.130"></a>
<FONT color="green">131</FONT>    }<a name="line.131"></a>




























































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